Electric delayed combination lock



June 15, 1937. w. T. BENHAM 2,033,816

ELECTRIC DELAYED COMBINATION LOCK Filed April v, 1956 2 Sheets-Sheet 1WIYI/ 'am IBM/mm W. T. BENHAM ELECTRIC DELAYED COMBINATION LOCK June 15,1937.

Filed April 7; 1936 2 Sheets-Sheet 2 W/llfam 7T Bem mm Patented June 15,1937 ilNi'iii ear 1;;

Arsr

ELECTRIC DELAYED COMBINATION LOCK Application April 7, 1936, Serial No.73,134

13 Claims.

The present invention relates to looks for safe, money depositories,etc. and particularly to delayed opening locks.

An object of the invention is to provide a relatively inexpensive devicecomprising a combination lock having cooperative relation with a timedelay mechanism which is operable according to prescribed operation ofthe combination lock so that authorized users may have a safe or thelike under the control of a combination lock and at the same timeselectively obtain the presently necessary anti-bandit protection andthe well known time lock protection for long periods.

It is a further object of the invention to efiect a unitary combinationof combination lock mechanism and electric time lock mechanism whichwill utilize a simple auxiliary means for converting the same at willinto a device having the characteristics of the ordinary selective longdelay interval time lock.

Another object of the invention is to provide an electric delaycombination lock utilizing a constantly operating low voltagesynchronous motor so that the device is at all times in condition to belocked either as an anti-bandit lock or as a normal time look withoutthe necessity of attention to switches or other conditioning means.

Another object of the invention is to provide a very simple and compactlocking mechanism that is under the direct control of a combination lockand which is under the automatic control of an electric time lockassuring a predetermined minimum of anti-bandit delayed opening and toprovide an extremely simple adjunct mechanism whereby the automaticanti-bandit delayed opening is deferred or prolonged according toselected setting in order to provide the usual time lock protection overthe night season or holiday season.

Another object is to provide an electric time lock requiring the settingup of a combination lock to its combination to one mark in order to 4.3initiate actuation of the electric time delay mechanism and the Waitingfor the lapse of the predetermined time interval, following which thesame combination is required to be set up on the combination look but toa different mark in 51 order to throw the bolt, failing which the effectof the initial actuation is nullified.

These and other objects are attained by the means described herein anddisclosed in the accompanying drawings, in which:

Fig. l is a rear elevational view of the lock with the anti-bandit timedelay mechanism, parts, including the entire synchronous motor, beingbroken away.

Fig. 2 is a top plan view of the device of Fig. 1.

Fig. 3 is an elevational View taken from the left hand side of Fig. 2but showing the motor in position. 7

Fig. l is a view taken on line i-4 of Fig. 2.

Fig. 5 is a fragmental view of a clutch wheel forming part of theinvention.

Fig. 6 is a side elevational view of said clutch Wheel.

Fig. '7 is an enlarged fragmental view showing a control pawl formingpart of the invention, in the position assumed upon initial operation ofthe combination lock.

Fig. 8 is a rear elevational View of the device of Fig. 1 havingcooperatively associated therewith the mechanism whereby extended timedelays are imparted to the operation of the device.

Fig. 9 is an enlarged rear elevational view of the selective delayinterval mechanism, part being broken away.

Fig. 10 is a view taken on line lfl-lfi of Fig. 9.

Fig. 11 is a view taken on line i l-il of Fig. 10 showing the device ofFig. 9 operatively controlling the anti-bandit combination lock.

Fig. 12 is a view similar to Fig. ll but with the device in inoperativeposition.

The lock of the present invention includes a combination lock that isarranged to be set up to two different markings disposed ondiametrically opposite sides of the dial and to require that thecombination be set up to the first of these markings in order to clutchin on a continuously operating synchronous motor driven mechanismconstituting part of an anti-bandit or short interval delay mechanismand to thereafter require the authorized operator to wait for thepredetermined short interval before the combination can be again set upto the second marking for throwing the bolt. The invention furtherincludes a simple accessory mechanism that is selectively set to nullifythe initial short delay interval by extending or prolonging it bymultiples thereof up to the largest time delay interval normallyrequired of time locks of whatsoever description. The device of theinvention is constituted essentially by a constantly operatingsynchronous electric motor, a means controlled by a combination lock toengage the clutch controlled delay interval mechanism with the motor, abolt mechanism actuated by the combination look after conditioning andpredetermined operation of the delay interval mechanism, and a simpleratchet type auxiliary mechanism for controlling the anti-banditprotection period up to any arbitrary maximum delay period. The latterauxiliary mechanism is of such nature that the device may be usedwithout it and serve as a highly efficient combination lock controlantibandit lock or said auxiliary mechanism may be associated therewithand quickly rendered inoperative or operative to selected delayintervals.

The device of the invention preferably employs a self-startingsynchronous electric motor operating on low voltage, e. g., 24: volts,and supplied through a step-down transformer from ordinary house currentsupply means and it is considered within the scope of this inventionthat the electric supply to said motor be optionally made inaccessibleso that if desired the actuating current can be shut off by akey-controlled electric switch remotely disposed.

Inasmuch as no signal or informing means are normally associated withthe device of the invention, it is necessary, in order to open the safeor other structure controlled by this look mechanism, that theauthorized operator shall know the combination which must be initiallyset up and he must also know and watch the time delay interval whichpermits actuation of the bolt upon the second setting up of thecombination. The operator must also know the ensuing period during whichthe second combination may be set up to throw the bolt. This arrangementcoupled with the auxiliary extended delay mechanism which is easily andfeasibly set up and adjusted from the interior of the door affords amost cornplete protection throughout the day and night season.

Referring now to the drawings: The device comprises a back plate 211having a shelf portion 2! extending therefrom, the back plate beingadapted to be secured to the door 22 of a safe or money chest in anyapproved fashion. At one side of the back plate is a slotted frame 23 inwhich the lock bolt 24 is reciprocably mounted. The combination lockindicated generally at 25 is mounted on the slotted frame 23 and has thearbor 26 extending through the aperture 21 in the bolt 24. The bolt 24is thrown by means of pivoted lever 28 engaging in the notch 29 and canbe actuated when the tumbler slots in tumblers 3| are set up inalignment according to a predetermined combination to admit gate member32 which has a pin 33 extending through an arcuate slot 34 and into theaperture 35 in the pivoted lever 28. With the combination thus properlyset up the delay knob 36 can be turned to throw the bolt 24.

The bolt 24, however, has an extension 31 which is normally held againstopening move ment by the periphery 38 of a check disc 39 having acut-away portion bounded by the faces 40 and 4| so that the check discmust be moved to a position approximating that shown in Fig. 4 in orderto effect opening movement of the bolt.

The check disc 39 is mounted. on a shaft 42 in side by side relationwith a clutch disc 43, both of said discs being capable of remainingstationary while the shaft rotates. A spring 44 having its opposite endsanchored to the discs 39 and 43, respectively, permits of limitedrelative motion of said discs and serves to build up sufficientpressure, when the face 4| of the check disc is against the retractedextension 3'5 of the bolt, to move the aperture in the check disc beyondsaid extension 3'! whenever the bolt is moved from open to lockedposition.

The clutch disc 43 has a slot 45 in which is pivoted an arcuate clutchlever having a toothed segment 4? extending through the slot in the sidethereof. The end 48 of the lever 46 normally projects outwardly adjacentthe periphery of the clutch disc and is visible in the notch 49 in theclutch disc. Spring means 50 urge the clutch lever to the lattermentioned position as may be seen in Fig. l. From the foregoing, it willbe seen that the toothed segment 4? of the clutch member is normallyurged radially inwardly toward the shaft. This toothed extension 4?meshes with a toothed wheel 5i Which is secured to or integral with gear52 which is driven through intermediate reversing gearing 53 by themotor pinion 54 which is carried by the shaft of the synchronous motorindicated generally at 55. Motor 55 is preferably of the low voltagetype now available, e. g., 24 volt self-staring synchronous motor, andis supplied with current through a step-down transformer 56 which may besupplied from ordinary house current source with a remote key-controlledswitch 5'! optionally in the circuit.

Under normal circumstances, the motor 55 operates continuously, therebycontinuously driving the gear 52 and toothed wheel 5!. When the lever 46is held in the inoperative position shown in Fig. 5, discs 39 and 43remain at rest. A pawl 53 pivoted as at 59 has a finger 68 which entersthe notch 49 in the clutch disc and depresses the end 48 of lever 46thereby holding the toothed segment 4? out of engagement with toothedwheel 5i rendering the clutch disc inoperative.

When the finger 63 on pawl 58 is removed from the notch 49, a segment 4?meshes with toothed wheel 5i and slowly rotates the clutch disc 43 andcheck disc 39 as a unit. The gear ratio in the drive mechanism ispreferably arranged so that approximately fifteen minutes are requiredbefore the leading edge of the aperture in the check disc passes beyondthe extension 3? on pawl 24. When this interval has elapsed and theaperture in the check disc is positioned as shown in Fig. 4, the boltmay be moved to open position. The clutch, however, remains engaged andthe clutch disc and check disc continue to rotate until the trailingedge 4! of the aperture in the check disc abuts the retracted extensionof the bolt whereupon the check disc is brought to rest while the clutchdisc continues to rotate for a distance, loading the spring 44 until thefinger 658 on bolt 58 which has meanwhile ridden on the uninterruptedportion of the periphery of the check disc enters notch 49 and pressesthe end 48 of lever 46, thereby disengaging the clutch and bringing thesaid discs to rest with spring 44 loaded.

As best illustrated in Figs. 1, 2, 3, and 7, the control pawl 58 hasassociated with its upper end a set and trip mechanism consistingessentially of a pivoted arm 6! urged by a spring 62 in acounter-clockwise direction and having projecting from the rear facethereof a pin 63 that engages the upper pointed end E4 of pawl 53 whenthe device is in inoperative position. Pawl 58 is urged by coil spring65 to turn clockwise on its pivot, hence the function of the tripmechanism is to hold pawl 53 in such position that the finger 69 thereofnormally enters notch 49 and holds the clutch lever out of engagementwhile the device is inoperative.

The function of members 58 and BI is to coniii.)

trolledly release the clutch to operative position and to againcondition the disabling means to automatically assume a position forthrowing out the clutch after predetermined operation.

In the position shown in Fig. '7, a pin 64 on arm BI assists in holdingthe finger 60 of pawl 58 in the notch 69 thereby disengaging the clutchdisc and holding it in a position of rest. When this is tripped bybodily withdrawal of the finger 60, the arm iii is tripped and pin 63 isreleased to the position shown in Fig. 1 holding the pawl 58 out ofcontact with the clutch disc and the end of the clutch lever so that thecheck disc and clutch now rotate under the power of the constantlyrunning motor and gearing. The pin 66 in the check disc is now moving inthe path of the extension iii of arm 8| and after a short interval tripssaid arms so that the pin 6| is under the mild pressure of spring 82 andurges the pawl 58 in a clockwise direction and the finger 68 rideslightly on the uninterrupted periphery of the clutch disc, ready toenter notch 49 and engage the end 48 of the clutch lever after thepredetermined time interval.

To initiate this action the combination lock is first set up to itsprescribed combination at the mark 68 adjacent the dial. This allowsgate 89 to drop into the aligned tumbler slots 30. When the dial is nowurged to move tumblers 3i in a clockwise direction as viewed from. Fig.1, a pin 'Iil engages a lug 'II on pawl 58 whereby the pawl is moved andthe clutch 48 is released to operatively engage toothed wheel 5|.

After the check disc 38 has slowly turned for the anti-bandit delayinterval of say fifteen minutes, the combination lock must be again setup to the second mark I2 which is preferably diametrically opposed tomark 68 at the periphery of the dial. This must be done within arelatively short period of say three minutes in order to be able towithdraw the bolt from its keeper into the aperture between the faces 48and 4| of the check disc to unlock the door. If this short periodelapses without the combination and bolt having been so operated, thecheck disc again presents its periphery to the end 3'! of the bolt 2tand the safe remains locked. In this event the finger 68 enters thenotch 49 and throws out clutch 48 as previously described.

The wiring to transformer 46 is preferably concealed. The wiring fromsaid transformer to motor 55 is by way of conductors I3 and I4 which mayeither pass through the inside of the vault or money chest with perfectsafety or they may be entered from the exterior of the door if desiredas is diagrammatically suggested in Fig. 2. It will be appreciated thatsevering the conductors or cutting the switch 51 makes it impossible tooperate the lock.

The structure thus far described serves as a fool-proof anti-banditcombination lock which requires a knowledge on the part of theauthorized user of the delay interval and the operating interval foropening the safe or money chest to which the lock is attached.

The hereinafter simple and inexpensive auxiliary mechanism may be addedto the lock just described without altering its anti-bandit functionandat the same time it will enable the user to disable the clutch operatingmeans for any desired delay interval such as would be required for nightand holiday protection. After such operation the lock may at any time beoperated, and. after waiting the lapse of the anti-bandit delay period,may be opened in the aforedescribed manner. This mechanism consistsessentially of a lug I5 carried on the face of the gear 52 which engagesand actuates a step by step toothed wheel and ratchet mechanism. once inaproximately twenty minutes and a means to set said ratchet mechanism sothat after a predetermined delay interval the bar member 76 is withdrawnfrom a position in the aperture TI which is formed by the toothedportion 4? of the clutch lever and the slot 44 in the clutch disc.

Referring now to the drawings, Figs. 8 to 12, inclusive, the adjustableinterval device comprises a back frame I8 adapted to be secured upon theinner face of the safe door with the edge I9 thereof in abutment withthe edge 80 of the lock mechanism whereby the bar I8 projects through asuitable aperture in the adjacent side of the cover case BI of the lockmechanism and has its end disposed in such position that it can beprojected into the space between the disengaged clutch segment 41 andthe adjacent portion of the clutch wheel 43. Between the frame member I8and front frame 82 a short shaft 83 is suitably journalled and carriesfixedly or integral therewith a toothed wheel 84 and an elongated pinion65. Intermediate pinion 86 meshes with pinion 85 and with the toothedperiphery iii of a graduated indicator wheel 88. The indicator wheel 88has a coil spring 89 which may be tensioned sufficiently to precludeslippage thereof through the pinion train just described relative to apawl 98 which is spring urged by member 9! to seat between the teeth oftoothed wheel 84. The bar I6 is reciprocable in guide 92 and has thepawl 98 pivoted thereon.

An independently reciprocable U-shaped yoke comprising arms 93 and 9% isslidably mounted in guides 95 and 96, the arm 94 carrying ananti-friction roller 91 which in the projected position of said yoke isadapted to be engaged by the lug E5 on gear wheel 52 in the look. Thisyoke has a notched pawl 98 pivoted thereto and urged by a spring 99 intoengagement with the toothed wheel 84. The shaft 83 has an angular keyI88 adapted to receive a socketed thumb piece IGI which is preferablymade removable and whereby the shaft and its pivot wheel and pinion maybe rotated in a clockwise direction whenever the notched pawl 98 ismanually withdrawn therefrom as by means of hub I82 having a pin I83 toengage the' notch IM in said pawl. This movement is effected by a thumbpiece Hi5 socketed to receive a key end I88 on said hub. The movement ina counter-clockwise direction can be manually effected by turning thethumb piece IOI without the necessity of depressing the notched pawl 98.It will furthermore be noted that whenever the yoke comprising arms 93and 94 is reciprocated in one direction by engagement of roller 91 andlug 75 against the yielding resistance of a spring urged plunger Iii!the notched pawl 98 which is carried by said yoke will move the wheel 84one notch in a counter-clockwise direction. The pinion 85 rotating withsaid wheel transmits a corresponding movement to the toothed indicatorwheel or disc 88. The pawl 99 serves to arrest the toothed wheel 84 butdoes not preclude the desired movement thereof.

A lever I88 mounted behind dial wheel 82 has a spring thereon whichurges the end I09 thereof away from the extension Iii on the yoke. A piniI I on the back of the dial wheel is adapted to contact a projectinglug H2 on the member I88 as the dial wheel approaches Zero position, theimpulses imparted to the dial wheel. there after causing the pin HI tomove the member I 08 so that the end I39 retracts the yoke bodily for adistance suflicient to remove the roller 3? out of the path of lug l5and at the same time 5 the bar l6 which has a pivotal connection withthe member IDS is retracted and releases the clutch member il. A covercase I I 2 which houses this mechanism has a window l is therein whichdiscloses a fragment of the dial on wheel 88 and 10 also the fixedindicator H4 which cooperates therewith to show the number of notches interms of hours at which the mechanism is set at the moment.

With the electric delayed combination and the long interval delaymechanism operatively associated on the door as shown in Fig. l, theoperation of the device to its various purposes is as follows. Duringthe daytime when anti-bandit protection only is desired, the dial wheel88 is left at zero or in the sub-zero interval provided on the dial,Assuming that the safe is open and the extension 31 of the bolt 2A is inthe aperture in the check disc, the motor 55 is continuously run withthe clutch held out of engagement by the finger 60 engaging in the notch48 and depressing the end 48 of the clutch lever. If the custodian ofthe money chest or safe has any reason to become suspicious or fearfulof a hold I up, he need merely turn the dial knob 36 which causes lever28 to throw the bolt to a locked position. In so doing the safe or chestis conditioned so that it requires the following operation to again openit. First, the given combination W is set up to the mark 88 adjacent thedial whereupon gate 69 drops into tumbler slots 38 and the dial knob isthen given a short movement to cause the extension on the gate torelease the pawl 58 to throw in the clutch. The custodian must now waitthe full anti-bandit delay period, 4.!) e. g., fifteen minutes, and,within the following approximately four minute interval, he must re--set the combination against the mark '.'2 and throw the bolt into theaperture in the check disc, thereby unlocking the safe or money chest.In the hands of an unauthorized person most of the normal efiorts toforcibly or surreptitiously open the safe result in throwing out theclutch and thus increasing inadvertently the anti-bandit delay period.5;) At closing time the custodian opens the door of the safe or moneychest, and, after first depressing the finger lever H85 turns the thumbpiece lill and causes the dial 88 to turn counterclockwise until thenumeral representing the desired number of elapsed hours appearsopposite the indicator finger H4. If he inadvertently throws the dialwheel too far, he may release the finger piece H15 and turn the dialback to the desired exact location using merely the member i ll 5. Thesafe or chest is then closed and the bolt shot whereupon the wheel 52continues its rotation and each time the lug l5 thereon meets the nowprojected roller 91, the yoke is depressed and causes the notched pawl98 to move wheel 8 F one notch. This motion is transmitted through thepinion train to the indicator wheel and the pin Ill on the saidindicator wheel moves successively closer step by step to the lug M2 onmember Hi8. During the last two or three move- 70 ments at approximatelyzero the pin is exerting force on the lug H2 and loading the springassociated with member I08. When end m9 of member iii? abuts theextension MB of the yoke, the bar i5 is withdrawn from its position, asshown in Fig. 11, to the position shown in Fig. 12, where upon thecombination lock must be set and antibandit delay period m'ust elapseand the final combination can then be set up and the bolt withdrawn.

From the foregoing it will be understood that the arrangementsubstantially as shown provides in a combination lock of slightlymodified form an anti-bandit type of lock control and a long delayinterval time lock feature. The mechanism is simple and sure in itsoperation and cannot be improperly opened after it is set and the safedoor is locked. The device is furthermore considerably less expensive tomanufacture than the previously used time locks embodying delicate watchmovements. It is to be understood furthermore that two or more of thelocks of the invention may be utilized on large bank vaults if desired,this being a matter of custom to insure positive protection. A singleelectric delayed combination of the invention will be understood toafford ample and fool-proof protection over the night and holidayseasons. These locks have the added advantage over spring drivenmovements that they merely require setting instead of winding andsetting hence'they eliminate the danger incident to incomplete winding.

What is claimed is:

1. In an electric delayed combination lock the combination with acontinuously rotating synchronous motor, gear means continuouslyrotating therewith, a check disc, a clutch disc, a normally inoperativeclutch adapted to engage said gear means whereby the clutch disc andcheck disc are rotated therewith, a combination lock having a pair ofgates separately movable into the tumbler slots thereof, a slidable boltnormally checked by the check disc, one of said gates being operative tomove the bolt, and means conditioned by the other of said gates uponproper actuation of the combination lock whereby the clutch mechanism isreleased to operative engagement with the constantly operating gearmeans for moving the check disc, after a predetermined interval ofoperation, into a position wherein said check disc permits operation ofthe bolt by said first mentioned gate.

2. In an electric delayed combination lock the combination with acontinuously rotating synchronous motor, gear means continuouslyrotating therewith, a check disc, a clutch disc, a normally inoperativeclutch adapted to engage said gear means whereby the clutch disc andcheck disc are rotated therewith, a combination lock having a pair ofgates separately movable into th tumbler slots thereof, a slidable boltnormally checked by the check disc, one of said gates being operative tomove the bolt, means conditioned by the other of said gates upon properactuation of the combination lock whereby the clutch mechanism isreleased to operative engagement with the constantly operating gearmeans for moving the check disc, after a predetermined interval ofoperation, into a position wherein said check disc permits operation ofthe bolt by said first mentioned gate, and means comprising a bar and anadjustable step by step toothed wheel mechanism operable by the gearmeans for prolonging the delay interval by selected multiples of thenormal delay interval.

3. An electric delayed combination lock comprising a combination lock, afirst gate operable thereby, a second gate operable by said combinationlook, a lock bolt operable by said second gate, a slotted bolt checkmember controlling the bolt, a continuously driven member, a normallyinoperative clutch adapted in its engaged position to efiect a drivingconnection between the bolt check member and said continuously drivenmember and means operable by the first mentioned gate for releasing theclutch to operative position whereby the check member is moved by saidcontinuously driven member to a position permitting retraction of thebolt by said second mentioned gate.

4. An electric delayed combination lock comprising a combination lock, afirst gate operable thereby, a second gate operable by said combinationlook, a lock bolt operable by said second gate, a slotted bolt checkmember controlling the bolt, a continuously driven member, a normallyinoperative clutch adapted in its engaged position to effect a drivingconnection between the bolt check member and said continuously drivenmember, means operable by the first mentioned gate for releasing theclutch to operative position whereby the check member is moved by saidcontinuously driven member to a position permitting retraction of thebolt by said second mentioned gate, a lug on said continuously drivenmember, a reciprocable bar member yieldably urged to a position forrendering the clutch inoperative, a reciprocable yoke, a step by stepratchet mechanism, a toothed dial wheel geared for movement therewith,means on the dial wheel for retracting the bar when said wheel reaches apredetermined position, means to manually rotate the toothed wheelwhereby the means on the dial wheel is moved away from said bar memberand means to periodically engage the lug on said continuously drivenmember whereby the toothed wheel and dial wheel are retracted step bystep until the bar is released from said clutch.

5. In an electric delayed combination lock, the combination with acontinuously operating synchronous motor, a lock bolt, a bolt checkmember movably mounted and having an aperture therein to receive thebolt in unlocked position, means whereby said motor may move said checkmember to dispose the aperture in position to receive said bolt, aclutch yieldably urged to operative position, yieldably urged means toautomatically render the clutch inoperative, a combination lockcomprising tumblers having slots adapted to be aligned, and a pair ofgates severally movable into the aligned slots, one of said gates beingoperative by said tumblers to release said yieldably urged means, theother of said serving, upon subsequent positioning of the check means,to enable movement of the bolt into the aperture in the check means.

6. In an electric delayed combination lock the combination of acontinuously power driven member, a check disc, a clutch means yieldablyurged to operatively connect the check disc with the driven member,yieldable means to hold the clutch in an inoperative position, acombination tumbler lock having an associated gate member operative torelease said clutch holding means, a lock bolt and a second gate for thetumbler lock operatively connected to move the lock bolt as permitted bysaid check disc.

'7. In an electric delayed combination lock the combination of acontinuously power driven member, a check disc, a clutch means yieldablyurged to operatively connect the check disc with the driven member,yieldable means to hold the clutch in an inoperative position, acombination tumbler lock having an associated gate member operative torelease said clutch holding means, a lock bolt, a second gate for thetumbler lock operatively connected to move the lock bolt as permitted bysaid check disc, a reciprocable bar adapted to also hold the clutch inan inoperative position, an adjustable step by step toothed ratchetmechanism, means to manually rotate said ratchet mechanism in onedirection to selected positions, means intermittently actuated by thecontinuously power driven means to intermittently rotate said ratchetmechanism step by step in the opposite direction and cooperating meansassociated with said bar and ratchet mechanism to retract the bar afterfull retraction of the ratchet mechanism from its selected manualsetting whereby the check disc is placed under the control of theyieldable clutch holding means and said combination lock.

8. The combination with a continuously rotating member and a clutchyieldably urged to engaged relation thereto, of a reciprocable barmechanism spring urged to a position for holding the clutch ininoperative position, a toothed dial wheel means on said wheel toretract the bar when the wheel is in predetermined position and meansincluding a toothed ratchet wheel adapted to be intermittently actuatedby said continuously rotating member for step by step movement of saiddial wheel to said predetermined position wherein the bar mechanism isretracted, the retraction of said bar serving also to render theintermittently actuated means inoperative.

9. In an electric delayed combination lock mechanism, a combination lockcomprising tumblers having slots therein, a pair of gates dispose-d atsubstantially diametrically opposite sides of said tumblers for separatecooperation with the aligned slots in said tumblers, a continuouslydriven toothed wheel, a clutch disc adjacent thereto, a clutch leverpivoted on the clutch disc and having a toothed segment yieldably urgedto engaging position with said toothed wheel, said clutch disc having anotch therein into which the end of said clutch lever projects when theclutch is in engaged position, a pawl having a finger thereon adapted toenter the notch in the clutch disc and to engage the end of the clutchlever for disengaging the segment from said toothed wheel, an extensionon one of said gates adapted to engage said pawl for moving the fingerout of the notch in the clutch disc, a slotted check disc having ayieldable connection with the clutch disc whereby said discs normallymove together but are capable of limited relative movement, a lock bolthaving an extension receivable in the slot in the check disc, meansactuated by the other gate for moving the lock bolt and a trip mechanismnormally holding the pawl in position to disen gage the clutch lever andadapted to be rendered temporarily inoperative by actuation of the firstmentioned gate and to subsequently be conditioned for operativeengagement by the continued rotation of the discs.

10. In combination a toothed ratchet wheel, a toothed dial wheel andmeans associated with said whee-ls whereby rotation of either wheeleffects rotation of the other wheel, a slidable yoke, a notched pawlcarried by said yoke and adapted upon movement of the yoke in onedirection to advance the toothed ratchet wheel in one direction, meansto manually remove said notched pawl from engagement with the toothedratchet wheel, means to manually rotate the toothed ratchet wheel in theopposite direction when said notched pawl is withheld from engagementtherefrom, a spring projected bar, and means associated with said barand said dial wheel whereby movement of the dial wheel to apredetermined initial position by said notched pawl retracts the springprojected bar.

11. The combination with an electric delayed combination lock comprisinga continuously operating member and a clutch, of aprolonged delayauxiliary mechanism comprising a toothed dial wheel and a cooperatingratchet wheel, a reciprocably mounted bar spring urged to projectedposition wherein the clutch of said delayed electric combination lock isheld in inoperative position, a reciprocably mounted yoke adapted inprojected position to be intermittently reciprocated by the continuouslyoperating means and a notched pawl associated with said yoke and movablethereby to rotate the toothed ratchet wheel step by step in onedirection for effecting ultimate retraction of the bar by the dialwheel, said notched pawl being manually retractable from. operativeengagement with the toothed ratchet wheel permitting manual rotation ofthe toothed ratchet wheel and toothed dial wheel in either direction forefiecting predetermined set ting of said dial wheel.

12. In combination a continuously driven member having a lug thereon, acombination look, a pair of gates associated with said combination lockand separately cooperabletherewith as the lock is set up to itscombination adjacent said gates, a lock bolt operable by the combinationlock and one of said pair of gates, a clutch disc normally precludingmovement of the lock bolt, a clutch member to effect driving connectionbetween the continuously driven member and the clutch disc, clutchcontrol mechanism including an automatic trip and set means, adapted,upon actuation of the other of said pair of gates by said combinationlock, to release the clutch member to engage the continuously drivenmember whereby the check disc is rotated through a single revolution andthe clutch is then automatically disengaged by said trip and set means,the check disc being apertured to permit actuation of the bolt by itsassociated gate during a limited operation of said single revolution ofthe check disc, a finger adapted to disable operation of the trip andseat means, and adjustable means for rendering said combination lockinoperative for selected multiple periods of time required for arevolution of the continuously operating member.

13. The combination with an anti-bandit electric time lock comprising acontinuously rotating member, of a lug on said continuously rotatingmember, a step by step toothed wheel and ratchet mechanism, meanscontrolled by said mechanism for precluding operation of said antibandittime lock, and means operable by the lug on the continuously rotatingmember whereby the toothed wheel and ratchet mechanism is retractedstepby step at each revolution of the continuously rotating member.

WILLIAM T. BENHAM.

